Snorri Sturluson,
Heimskringla — Saga of Sigurd the Crusader and His Brothers Eystein and Olaf
“ In the meantime King Sigurd had been at high mass, and knew nothing of this until after he had dined that day. Then he said to Magnus angrily, "Thou callest Harald useless; but I think thou art a great fool, and knowest nothing of the customs of foreign people. Dost thou not know that men in other countries exercise themselves in other feats than in filling themselves with ale, and making themselves mad, and so unfit for everything that they scarcely know each other? Give Harald his ring, and do not try to make a fool of him again, as long as I am above ground." ”
